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1995-07-10
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3.1.11 SELECT ENVIRONMENT
The SELECT ENVIRONMENT command contains a number of options allowing you to
alter various environmental variables within X-CAD.
MODIFIERS
AUTOMENUS The AUTOMENUS modifier is used with one of the following
modifiers to toggle the use of automenus.
.ALL Toggle all system automenus on or off.
.VERBNOUN Toggle the verb-noun automenus on or off.
.MODIFIERS Toggle the modifier automenus on or off.
.IDENTS Toggle the IDENTS automenus on or off.
ARCQUALITY All curves on X-CAD such as arcs, ellipses and splines, are
drawn as a series of connected line segments. The ARCQUALITY
modifier can be used to adjust the number of segments that
make up a single curve.
When plotting a drawing on a high resoloution raster plotter,
the fact that curves are made up of line segments may be
visible. To obtain the smoothest possible looking curve on
a plotter, it may be necessary to adjust the arc quality to
a higher precision to obtain the desired results. This is
done in 2 stages:
#SELECT ENVIRONMENT ARCQUALITY value ( see below )
will set a new curve precision. Only entities created after
this command will use the new value though. To change any
current entities to the new curve precision, the command
#REBUILD GRAPHICS CURVEONLY
must be used. This will rebuild the graphics display list
for any entities that contain curves to the current
ARCQUALITY setting.
Note, the ARCQUALITY setting also affects the number of
locations that are returned when using GENERATE or CHAIN
in IDENTS.
The ARCQUALITY settings are as follows:
XCOARSE Generates very low precision curves, but as
these curves are made up of fewer line
segments the display speed is greatly in-
creased. When higher precision curves are
required such as for plotting, the SELECT
DISPLAY ARCQUALITY / REBUILD GRAPHICS combi-
nation can be used.
COARSE Generates low precision curves.
MEDIUM Generates medium precision curves. This is
the default setting.
FINE Generates high precision curves.
XFINE Generates the highest precision curves.
UNDO The UNDO modifier is used with the following modifiers to
alter the size of the undo buffer used with the UNDO LAST
command.
.BUFFERSIZE Allows a new undo buffer buffer-size to be entered. The
modifier is follwed by the new buffer-size in kilobytes, ie
BUFFERSIZE 16 for a new buffer-size of 16384 bytes.
.LIST List the current size of the undo buffer.
AUTORETURN Allows auto-return to be toggled on or off. Auto-return is
a feature in IDENTS that is used to automatically move on to
the next stage of an IDENTS stream when the required number of
locations of selections has been entered. If AUTORETURN is ON,
the 'action' key or colon does not need to be used to move on
to the next stage of the command in IDENTS in cases where it
is normally required to be entered after a set number of
locations or selections has been entered.
REDRAW The REDRAW modifier is used to toggle the display of redraws
in commands such as ECHO LAYER or ECHO DEPTH. If REDRAW is
selected OFF, no command will redraw the screen except for
REDRAW DISPLAY. This modifier is usually used in execute
files to speed up execution.
ECHO The ECHO modifier is used to toggle the display of all
output to the console window. This modifier is usually
used in execute files to speed up execution.
FILEREQ The FILEREQ modifier is used to toggle the display of
file requesters displayed by commands such as OPEN DRAWING
or DRAW SYMBOL.